Lock.



F. I. KIMBALL.

LOCK.

APPLICATION FILED DEC. 6. I913.

1 137,762. Patented May 4, 1915.

I/V I/E IV TOR A TTORNEY THE NORRIS PETERS CO.. PHOTG-LITHQ, WASHINGTON, n. C.

FRANK I. KIMBALL, OF WEST HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT 8c COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCK.

Specification of Letters Patent.

Patented May 4, 1915.

Application filed December 6, 1913. Serial No. 805,065.

To all whom it may concern:

Be it known that I, FRANK I. KIMBALL, a citizen of the United States, residing in the town of West Haven, county of New Haven, and State of Connecticut, have invented certain new and useful Improvements in Locks, of which the following is a full, clear, and exact description.

This invention relates to looks, and more particularly to cylinder locks especially adapted for use in connection with mortise locks and latches.

The invention also refers especially to certain locks operable by a plurality of keys, including a change key and a master key.

One object of the invention is to provide a cylinder lock having a slide therein forming a permanent part of the lock, which slide is so arranged as to be moved relative to the key plug, and the dog or rollback connected with the rear end of the key plug, by engagement with the master or emergency key when the latter is inserted into the keyway, said slide when so actuated being adapted to operate (by means of a secondary, or emergency dog or rollback) a art of the latch or look mechanism with which the cylinder lock is associated, at or about the same time that another part of such latch or look mechanism is actuated by the regular dog or rollback. When, however, the change key is inserted into the keyway to actuate the regular dog or rollback, the secondary or emergency rollback is inoperative on the latch or look mechanism.

To these and other ends, the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a fragmentary vertical section of a mortise lock equipped with my improvements, showing the change key inserted in the cylinder lock; Fig. 2 is a similar view, showing the emergency key inserted in the cylinder lock; Fig. 3 is a rear end elevation of the cylinder lock; Fig. 4 isa horizontal section of the rear end portion of the cylinder lock; and Figs. 5 and 6 are fragmentary elevations of the mechanism in the mortise lock, showing the emergency bit or rollback in diiferent positions.

Referring to the drawing, 10 indicates the case of a mortise lock or latch, of any appropriate type, and 11 indicates, generally, a cylinder lock secured in the usual manner in an opening of the case wall. The cylinder lock 11 comprises the cylinder 12, the sleeve 13, rotatable therein, a plug or barrel 1% rotatable in said sleeve, and the usual tumbler pins 15. At the rear end of the cylinder lock is a bit, rollback or dog 16, which in the form shown is arranged and operated in the manner described in Letters Patent No. 1,069,73 l, granted to Sargent & Company, on August 12, 1913, as assignee of John H. Shaw. The bit or dog 16 is carried by the cylinder lock proper, at the rear end of the same, and is adapted to be turned from the key plug 14: by means of an operator 16*, secured to the rear end of said key plug. Suitably guided in the rear end of the keyway is a slide 17, movable longitudinally in the key plug. retracted by a spring 18, but is adapted to be projected rearwardly of the keyway by a certain key or keys in order to engage a recess 19 of an emergency bit or rollback 20 rotatable on the case wall at a point opposite the cylinder lock. The coiled spring 18 normally holds the slide 17, with its end substantially flush with the guide flanges 21 projecting rearwardly from the cylinder lock, as shown in Fig. l, and between which said slide is confined. The bit 16 of the cylinder lock and its operator 16 are provided with suitable openings through which the slide 17 is movable as shown.

When a change key 22 is inserted into the lock, the pointed end of the key shank will take into a correspondingly formed recess 23 in the inner edge of the slide 17 whereby said slide is permitted to remain in its normal position. The emergency key 24, however, is provided with a squared off extremity 2%, which does not iii; the recess 23, but, on the other hand, comes in full contact with a portion of the edge of the slide 17 in such a manner that the latter is thereby protracted into a position wherein it extends into the emergency rollback 20, and connects the key plug with said rollback. It will therefore be understood from the foregoing description that the regular dog or rollback connected with the rear end of the key plug is adapted to be actuated in the usual manner by either of two keys, whereas the'secondary, moved to act on the latch or lock mechanism only when the slide 17, or its equivalent, is

The slide 17 is normally held or emergency dog or rollback is.

I shifted by one of said keys. The spring 18 acting on the slide normally holds it 1n a definite position, wherein said slide will be engaged and shifted by the'emergency key. The slide is moved relative to the regular dog or rollback by one key without being so moved by the other key, and the particular direction of movement of the slide is immaterial in the broad aspects ofthe invention.

In the embodimentshown, the rollback 20 is adapted to operate a slide for deadlock-- ing the latch bolt, but the particular part operated by said rollback is not material, nor is the specific form of the cam arm itself. Various changes in these and other respects may be adopted within the scope of the claims. v

It will be understood that by my invention the emergency key can, as shown, be substantially of the sameoverall length as the change key, which dispenses with theuse of an emergency key of inconvenient size.

What I claim is:

1. A cylinder lock having a key plug with I a keyway, arollback connectedwith the rear end of the key plug, a change key insertible into said'keyway to rotate the key plug and saidrollback, an emergency key insertible intothekeyway to rotate the key plugand said rollback, and a slide adapted to actuate a part of an exterior lock or latch mechanism, extending into said keyway and adapted to be engaged and operated: by said emergency key, said slide being inoperative by said change key; substantially as described.

2. A cylinder lock having a key plug, said key plug provided with a keyway, a rollback on the rear end of the cylinder lock, means of connection bet-ween the key plug. and said rollback, whereby the formerturns the latter, and aslide in said'keyway'adaptedto be moved: bya key, and operating in: an opening through said rollback substantially as described.-

3. In a cylinder lock, the" combination of a casing, a. sleeve rotatable therein, a. key plug rotatable in the sleeve, pin tumblers 00-- operating with the casing, sleeve and key plug,.said key plughaving'a keyway, a rollback rotatably mounted on the rear end. of the cylinder. lock,.an operator secured tothe rear end of the key plug for turning'said. rollback, and a slide in the keyway operate ingin openings through said rollback and operator; substantially as described.

4. In a cylinder lock, a key plug having a keyway, a. slide in the rear end. of said keyway, a key insertible in said keyway,.and arranged when so inserted to movesaid slide, a second key fully insertible in said: keyway, Without. moving said slide, lock mechanism, a rollback for. actuating said way, a spring normally holding said slide in retracted position, a key having its extremity conformed to said slide so as not to project the same, and another key having its extremity formed to substantially as described.

6. A cylinder lock mechanism having t-WO rollbacks,.two keys for said mechanism-,both,

adapted to operateone of said rollbacks, and

a slideactuated by one of said-keys only, for

operating the other rollback; substantially as described.

7. In: a' cylinder'lock, a key plug having a keyway, a sliding member in the rear end portion of the keyway,:a key insertiblein said;

keyway, and adapted to move said'member rearwardly, said member having a. recess of difierent shape than the inner extremity of.

said key, and. a second key insertible into said keyway, having an inner extremity to fitsaid recess; substantially as described.

8. In a lock, the combination of separate operating devices, a plurality of keys, 2.

common keyway for said keys,and a: deviceslidable lengthwise of said keyway, by engagement with only one of said keys, to couple said operating devices together; substantially as described.

9. In a cylinder lock, the combination with a key plug having a keyway, of a slide in the rear end: portion of the keyway, having a recess at its inner edge, means nor-' mally retracting said slide, a key insertible:

in: said keyway, and having an inner extremity conforming to the recess in said slide, and-a second key insertible'in saidkeyway, and having its inner substantially as described.

10. The combination with a cylinder lock having a key pluganda dog or rollback, of

a slide. at the rear end of said lockformmg' having a key'plugianda dog or rollback, of. a slide forming, a; part of said cylinder. lock and permanently securedv to the rear end thereof, .a springjnormally holding said" slide in a definite position, a key insertible into said key plug and formed to engage said slide and move it in opposition to'said spring, and a second key fully' insertible into said key plug without moving said slide; substantially as described.

project the slide extremity formed to abut said slide withoutfittingsaidrecess';

the key plug.

12. A cylinder lock having two keys, a rollback operable by both of said keys, and a slide to operate a part outside of and at the rear of said cylinder lock, extending into the keyway of'said cylinder lock and opera tive by one of said keys but inoperative by the other key; substantially as described.

18. A cylinder lock having a key plug with a keyway, a dog or rollback connected with the rear end of the key plug, a change key insertible into said keyway to rotate said key plug'and said rollback, an emergency key insertible into the keyway to retate said key plug and said rollback, and a slide carried by the cylinder lock adapted to be engaged and moved bodily by the emergency key as the latter is inserted into the keyway, said slide being immovable by the change key as the latter is inserted into the keyway; substantially as described.

14. A pin tumbler lock having a key plug, said key plug provided with a keyway, a rollback connected with the rear end of said key plug, and a key-engaging slide in the keyway; substantially as described.

15. A pin tumbler lock having a key plug, said key plug provided with a keyway, a

rollback connected with the rear end of thev key plug, a slide in said keyway adapted to be moved by a key and operating in an opening in said rollback, and a spring for holding said slide in a definite position relative to the keyway; substantially as described.

16. A pin tumbler lock having a key plug, said key plug provided with a keyway, a rollback connected with the rear end of the key plug, two keys fitting said keyway, a slide movable bodily relative to said rollback and adapted to be shifted relative to said rollback by only one of such keys when the latter is inserted into the keyway, and a spring for holding said slide in engagement with the last named key; substantially as described.

17. In a pin tumbler look, a key plug having a keyway, a rollback connected with Copies of this patent may be obtained for the rear end of the key plug, a second roll-, back, and a key-engaging slide for actuating the second rollback, movable relative to the first rollback; substantially as described.

18. A cylinder lock having a key plug, said key plug provided with a keyway, a plurality of pin tumblers cooperating with said key plug, a key insertible into said keyway to cooperate with said pin tumblers and rotate said key plug, another and different key insertible into said keyway to co operate with said pin tumblers to rotate said key plug, and a slide extending into the keyway and movable rearwardly into a pre determined operative position by one of said keys but not by the other key; substantially as described.

19. A cylinder lock having a key plug, said key plug provided with a keyway, pin tumblers cooperating with said key plug, a key insertible into said keyway to rotate said key plug, another and different key insertible into said keyway to rotate said key plug, and a slide forming a part of said cylinder look at the rear part of the latter, and movable rearwardly by one of said keys only but rotatable by both of said keys; substantially as described.

20. A cylinder lock having a key plug, said key plug provided with a keyway, pin tumblers to cooperate with said key plug, a key insertible into said keyway to rotate said key plug, another and diflerent key insertible into said keyway to rotate said key plug, and a slide connected with the rear part of said key plug to rotate therewith, said slide having a predetermined operative position into which it is slidable by means of one of said keys only; substantially as described.

In witness whereof, I have hereunto set my hand on the 4th day of December, 1913.

FRANK I. KIMBALL.

Witnesses:

TERESA FITZSIMONS, WILLIAM A. Bron.

Washington, D. C. 

